JPH02281521A - Multipole vacuum breaker and insulating support frame for multipole vacuum breaker - Google Patents

Abstract

PURPOSE: To simplify the constitution and improve the economy by integrating a base and an insulating support part into an insulating support frame. CONSTITUTION: A vacuum opening/closing pipe 15 accommodates a movable contact 58, etc., through a spring motor 36, and an insulating support part 14 for a bearing part, etc., for such components as the pipe 15, shaft of spring motor 36, etc., is formed in a single piece with a base 12 accommodating a connecting rod 40 for driving the contact 58 so that one insulating support frame 10 is constructed. Accordingly the constitution of the insulating support frame 10 is simplified, and the economy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multipole circuit breaker and an insulating support frame for a multipole circuit breaker array.

(Prior Art, Problems to be Solved by the Invention) A multipolar vacuum circuit breaker having a traveling base is known from European Patent Specification No. 60054. An insulating support part integrally fixed to the rear of the base has three juxtaposed and forward-opening recesses, each of which has a vacuum opening/closing tube fixed thereto. Furthermore, a housing is fastened to the base, in which a drive, for example a spring spring, is arranged, which is connected via a connecting rod to a movable switching contact of the vacuum switching tube. A downwardly projecting extension is molded into the insulating support.
This is the supporting part for the two-arm lever of the connecting rod. Although this insulating support serves several functions, the entire circuit breaker construction is still expensive.

Yet another circuit breaker arrangement is disclosed in U.S. Pat. No. 4,587,390.
Known by the number. It has a housing containing a spring motor on which three tubular insulating support frames are placed upright. A vacuum switching tube is fixed in each insulating support frame, the contacts of which are connected to a respective connecting conductor passing through each insulating support frame in the radial direction. Within the spring motor housing are two laterally spaced apart parallel end plates on which the drive of the spring motor is supported. Each movable contact of the vacuum switching tube is operatively connected via a connecting rod to a driven member common to all poles of the spring motor. This circuit breaker has many individual parts and is expensive to design and assemble.

Another conventional example is Swiss patent application specification cylinder 2283/
There is a multipolar vacuum circuit breaker described in No. 88-0.

An object of the present invention is to provide a circuit breaker according to the preamble of claim 1 and an insulating support frame according to the preamble of claim 13, which are simple in structure, have a small number of parts, and can be manufactured at low cost. It is.

(Means and effects for solving the problem) This object is achieved by the features of the characteristic part of claim 1 or 13.

An integral insulating support frame is provided which is formed by the base and at least one support for supporting the insulating support and the components of the spring motor. The insulating support frame is therefore not only an insulating support element for the vacuum switching tube, but also a fixed component of the drive and the base. The drive, the insulating support and the base thus form a functional unit which can no longer be separated. Such an insulating support frame can be manufactured by injection molding, casting, foam molding or similar methods.

In one embodiment, the insulating support frame has a substantially hollow box-shaped base upon which the insulating support is disposed. This base part provides sufficient stability to the insulating support frame and can optionally be used for a spring motor as specified in claim 7 or for movable switching of a vacuum switching tube as defined in claim 6. Provide space for the connecting rod that mates with the contacts.

This allows for a very precise construction of the circuit breaker.

With the configuration according to claim 3, the insulating support frame can be manufactured easily.

By virtue of the double construction of the wall, an especially good stability and insulation capacity of the wall is achieved. The freely accessible space between the walls makes it possible (problematically) to fasten and assemble current-carrying parts to the walls, while maintaining the insulation of the walls.

In the structure according to claim 5 or 6, the spring motor is arranged on the opposite side of the wall portion from the insulating housing. Such an arrangement is characterized by unobstructed access to the spring motor even when the circuit breaker arrangement is in operation.In an arrangement according to claim 7, the spring motor is provided at the base of the insulating support frame. This makes it possible to have a particularly slim construction of the circuit breaker and to construct the connecting rod between the spring motor and the vacuum switching tube in a particularly simple manner.

Other configuration aspects are specified in the other claims.

(Example) The present invention will be described in detail below based on illustrated embodiments.

1 to 3 show an insulating support frame 10 for a three-pole circuit breaker, designated by the symbol IO. An insulating support part 14 for 15 is molded. The insulating support 14 has an upright wall 16 that extends generally along the neutral plane of the base 12 .

The wall 16 is constructed as a double wall and, viewed in plan, is the cross-section of a rectangular hollow profile. At half the height of the wall section 16 a horizontal intermediate base 18 is provided, which connects the two walls 20.2 of the wall section.
2 to each other (see especially FIG. 2), above the intermediate base 18 there is a vertical belly 24 connecting the two walls 20.22 of the wall section and attached to the individual poles of the circuit breaker. This abdomen mutually insulates an upwardly open cavity 26 formed by the wall 20.22 of the wall and the abdomen 24 (FIG. 1).

Below the intermediate base 18 and between the two walls 20.22 of the wall section, a further belly 28 is arranged, which extends within the vertical plane 30 indicated by the dash-dotted line, which forms the neutral plane of the multipole circuit breaker. It has been extended to. This additional abdomen 28 extends downwardly from the wall 16 and projects into the base 12 in the form of a tongue. In its projecting region, this further abdomen 28 has a bearing 32 for supporting a connecting rod part 40 connecting the spring motor 36 with the vacuum switching tube 15 and a connecting rod part consisting of a two-armed lever 34, respectively. It should be noted that the intermediate sole 18, the abdomen 24 and the abdomen 28 described above constitute a reinforcing part that connects the two walls 20, 22 of the wall part 16 to each other.

On the front side of the wall 16 shown on the left side of the figure, an insulating housing 42 with a U-shaped cross section symmetrical with respect to the neutral plane 30 of the multipole is molded onto the wall 20 of the wall 16; An insulating housing 42 that completely surrounds the vacuum opening/closing tube 15 with a part
is open upward and toward the base portion 12 at the bottom.

Projecting forwardly from each insulating housing 42 are two horizontally spaced apart, horizontally extending tubular insulating tubes 44 whose longitudinal axes 44' lie on the neutral plane 30. Each insulating tube 44 has upper and lower connecting conductors 4 coaxial therewith, respectively.
6.48 (see especially FIG. 2), upper connecting conductor 46
are suitable recesses 50 provided in the insulating housing 42, respectively.
and an opening 52 provided in the wall 20 of the wall portion diametrically opposed to the opening 52 . At the same time, the upper connection conductor 46
can be fixed to the insulating support frame 20 using a mounting element (not shown) arranged in the cavity 26. Regarding the connection conductor 46 and the assembly and fixing of the connection conductor 46 and the vacuum switching tube 15, see Swiss patent application specification box 294/
It is described in detail in No. 89-1.

The vacuum switching tube 15 has a fixed switching contact 54, which is fixed to the inner end of a switching pin 56 inserted through and fixed to the housing 15' of the vacuum switching tube 15. The upper end of the switching bin 56, and thus the vacuum switching tube 15, is fixed to the upper connecting conductor 46. The axis of the vacuum switching tube 15 runs in the vertical direction and is designated by the symbol 15''. The movable switching contact 5 of the vacuum switching tube 15
8 is a switching pin 60 inserted tightly into the housing 15'.
The push rod has a thick walled portion 62 at its lower end, on which a wheel 64 of a wheel/contact arrangement 66 rolls.

The thick part 62 of the switching rod 60 is connected to the shaft 15 of the vacuum opening/closing tube 15.
The lower connecting conductor is inserted through a suitable recess 50' provided in the insulating housing 42.

An intermediate base 70 formed on the insulating housing 42 and on the wall 20 of the wall section has an open lower part 2 for the switching pin 60, and a lower connecting conductor 48 is screwed onto this intermediate base. The wheel 64 also rolls in the recess 68 of the lower connecting conductor 48 . The wheel/contact arrangement 66 and the fixing and construction of the lower connecting conductor 48 are described in detail in Swiss Patent Application Box 295/89-3.

On the back side of the wall 16 two parallel, spaced apart, vertically extending bearings 74 are molded into the wall 22 of the wall 16 and projecting from the wall 16 at right angles. This support portion 74 is constructed in the shape of a wall, and its lower end 76 reaches the top wall 78 of the base portion 12. Each bearing 74 has a bearing opening 80 and the spring motor 36
A drive shaft 82 of the second .
3), the axis 82' of the drive shaft 82 runs horizontally parallel to the wall 16 (see also FIG. 1); such a spring motor is described in detail in Swiss Patent Application Box 800 789-1. It has been stated.

Two parallel disks 84 spaced apart from each other for each pole are fitted onto the drive shaft 82 so as not to be twisted, and the six disks 84, of which only one is shown in FIG. It has a pair of inversely congruent grooves 86 extending generally eccentrically around the periphery, in which a bolt-like lifting element 88 is forcibly guided. The lifting element 88 includes a rocker 90 and a two-arm lever 34.
It is disposed at the upper end of a connecting fitting 92 which is swingably supported by the connecting member 92. The rocker 90 has a bearing end plate 9 formed on the wall 22 and the top wall 78 in the end range remote from the connecting fitting 92.
4, it is swingably supported. An opening 96 is bored in the top wall 78 in the area of the connecting fitting 92. A contact compression spring 98 surrounding the connecting fitting 92 in the area between the rocker 90 and the two-arm lever 34 is supported at its upper end by the connecting fitting 92 through one support disk 100 and at its lower end by the two-arm lever 34. has been done. The connecting fitting 92 has a slot 102 in its lower end region, through which a bottle 104 can be inserted into the lower supporting disk 100 and 2.
It is also connected to an arm lever 34.

The end range of the two-armed lever 34 on the side opposite to the bottle 104 is operatively connected to the thickened portion 62 of the switching pin 60 via an insulating rod 106.

When the drive shaft 82 of the spring motor 36 is in the rotational position shown in FIG. are pressed against each other. To disconnect the circuit breaker, the drive shaft 82 is rotated approximately 180° in the illustrated example by means of a spring arrangement (not shown), whereby the various coupling fittings 92 are forcibly guided by the lifting elements 88 in the grooves 86 of the disc 84. As a result, it is pulled to the upper end position 92' shown by the broken line. In this position the two switching contacts 54, 58 are separated and the contact compression spring 98 is as relaxed as the slot 102 of the coupling 92 allows. To close the circuit breaker, the drive shaft 82 is again turned in the same direction of rotation by means of a spring arrangement not shown, approximately 180' in the illustrated example, so that the switching contacts 54, 58 abut each other and the contact compression spring 98 is tensioned again. By appropriately shaping the groove 86 of the circular plate 84, the drive shaft 82
It is also possible to use different angles of rotation of the circuit breaker, in which case the total angle of rotation of the circuit breaker is in each case 360°.

A journal-shaped bearing member 11 is attached to the side wall 108 of the base portion 12.
0 is projected outwards, on which a running transfer 112, indicated by a dash-dot line, is supported. This traveling transfer 11
2 can be guided, for example, in a rail (not shown) of the opening/closing device. When guiding the traveling transfer member 112 within the floor rail, the bearing member 110 is moved from the side wall 108 to the base portion 12.
It is also possible to make it protrude toward the inside.

A link 114 is further formed on the base portion 12 and projects from the side wall 108 and extends in the direction of movement of the circuit breaker (first link 114).
(See Figure 3), this link 114 can be used to operate the lock in the switching device or the shutter of the bulkhead when the circuit breaker is moved.

FIG. 4 is a sectional view of the base portion 12 of the insulating support frame 10 shown in FIG.
It has substantially the same configuration as 0.

The spindle 116 is located below the two-arm lever 34 of the connecting rod 40.
The spindle 116 of the screw gear 118, which also forms part of the drive device, extends in the direction of movement of the circuit breaker.
It is fixed and rotatably supported relative to the insulating support frame 10 by open bearing elements 122 provided in the front wall 120 and the rear wall 120' of the two. The rotating nut 124 fitted onto the spindle 116 is fixedly held by an opening/closing device (not shown) so as not to be twisted. By turning the spindle 116 manually or by an electric motor, the circuit breaker can open the connecting conductor 46°4.
It is possible to pass from a closing position, in which the connecting conductor 46, 48 engages a fixed mating contact, to a breaking position, in which the connecting conductor 46, 48 leaves the corresponding fixed mating contact, or vice versa.

In the configuration shown in FIG. 5, a spring motor 36 is arranged on the base portion 12 of the insulating support frame 10.

In this case, the bearing part 74' corresponds to the bearing part 74 in FIGS. 1 to 3 and is provided inside the base part 12. Insulating support part 14
In this range, the insulating support frame 10 is constructed in the same manner as shown in FIGS. 1-3. The insulating support 14 will therefore not be described in more detail; the base part 12 shown in FIG. 5 is again box-shaped and open downwards and towards the rear side. The drive shaft 82 crosses the axis &'1115~ of the vacuum switching tube 15 at right angles (see FIG. 2), and is rotatably supported within a suitable opening 80 of the support portion 74'. On the drive shaft 82, two disks 84 per pole are also fitted in a twist-proof manner, in the grooves 86 of which a bolt-like lifting element 80 is guided. Each lifting element 80 is connected to a connecting fitting 92'',
The coupling fitting is operatively connected to a generally known contact pressure cotton spring arrangement (not shown) disposed within the bell-shaped extension 106' of the insulating plate 106''. It extends in the 15'' direction, and its upper end is connected to the thick wall portion 62 of the switching pin 60. The thick wall portion 62 is inserted into the recess 68 of the lower connection conductor 48. Roller/contact arrangement 6
The transfer 64 of No. 6 transfers the recess 68 and thick portion 62 of the connecting conductor 48. It is of course also possible to provide additional guide elements for the insulating rod 106'', which will not be described further, since the functioning of the spring motor 36 and the contact compression spring arrangement is exactly the same as in the previously described embodiments. This design saves particular space and allows the drive power to be transmitted to the vacuum switching tube with low losses and without the need for diversion via a connecting rod.

Of course, it is also conceivable to provide the base portion 12 with a bottom and close the bottom. However, in that case, in the embodiments of FIGS. 1 to 3,
A notch must be provided in the wall of the base part 12 so that the required parts of the connecting rod 40 can be inserted into and attached to the base part 12, in this embodiment the contact rams 60 are connected to the insulating lever 34. It could be directly linked to.

In the bearing 74.74' it is possible not only to support the drive shaft 82 (this bearing 74.74' and possibly the walls of the base part 12 and the wall part 16 also support the spring motor 3).
The other parts of 6, and preferably all parts, can be supported by them and arranged so that they can be placed there.

The integral insulating support frame is constructed so that virtually all components of the entire circuit breaker can be secured thereto.

(Effects of the Invention) Since the present invention is as described above, the structure can be simplified, and the number of parts and assembly man-hours can be easily reduced, so that costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a plan view of the insulating support frame. FIG. 2 is a vertical sectional view showing the insulating support frame, the vacuum switching tube and the spring motor arranged thereon, taken along II-II HA in FIG. 1. FIG. 3 is a side view of the lower part of the insulating support frame. FIG. 4 is a sectional view showing another embodiment of the insulating support frame pace section along the line II--II of FIG. 1. FIG. 5 is a vertical sectional view of the lower part of the insulating support frame that supports the spring motor with its pace. 14... Insulation support part, 15... Vacuum opening/closing tube, 36...
...Spring motor, 40...Connecting rod, 58...Movable contact. Schubrecher (and 2 others)

Claims (1)

[Claims] 1) An insulating support part that at least partially surrounds the vacuum switching tube of the circuit breaker placed on the base, and a movable switching contact of the vacuum switching tube via a connecting rod also placed on the base. In a multipole vacuum circuit breaker, in particular for medium pressure, with a connected spring motor, the insulating support (14) has at least one bearing (74, 7) bearing parts (82) of the spring motor (36).
4') and the base form an integral insulating support frame (10). 2) The circuit breaker according to claim 1, wherein the insulating support frame (10) has a hollow, downwardly-opening box-shaped base part (12), on which the insulating support part (14) is arranged. . 3) Upright wall (16) with flat insulating support (14)
3. The circuit breaker according to claim 1, further comprising an insulating housing (42) formed on one side of the insulating housing (42), which completely surrounds the vacuum switching tube (15). 4) The wall (16) is a double wall and the two walls (20, 2
4. Circuit breaker according to claim 3, characterized in that it is constructed with a reinforced abdomen (18, 24, 28) that connects the parts 2) to each other. 5) Circuit breaker according to claim 3 or 4, characterized in that at least one bearing part (74) is projectingly molded on the side of the wall part (16) opposite to the insulating housing (42). 6) The base part (12) has at least one bearing part (7) on the side of the wall part (16) opposite the insulating housing (42).
4) protrudes toward the wall (16) joining the base part (12), and the connecting rod part (4) is attached to the base part (12).
6. The circuit breaker according to claim 5, further comprising a support portion (32) for supporting the circuit breaker (0, 34). 7) At least one bearing part (74') is attached to the base part (1
5. The circuit breaker according to claim 2, wherein the circuit breaker is provided inside the circuit breaker. 8) At least two bearings (74, 74') are connected to the wall (
The circuit breaker according to any one of claims 5 to 7, characterized in that the circuit breakers are provided at substantially right angles to (16) and parallel to each other and spaced apart from each other. 9) The circuit breaker according to any one of claims 1 to 8, characterized in that a bearing member (110) for a traveling wheel (112) is molded on the base portion (12) of the insulating support frame (10). . 10) The circuit breaker according to any one of claims 1 to 9, characterized in that a link (114) is formed on the base portion (12) of the insulating support frame (10) for operating a lock or a shutter of the bulkhead. . 11) Support elements (122) for parts (116) of the drive device (118) for moving the circuit breaker in the base part (12)
The circuit breaker arrangement according to any one of claims 1 to 10, characterized in that it is molded. 12) The drive device has a screw gear (118), and its spindle (116) extending in the direction of movement of the circuit breaker is fixed in position with respect to the insulating support frame and rotatably supported by the base part (12). The circuit breaker according to claim 11, characterized in that: 13) The multi-function device according to claim 1 for medium voltage use, wherein the movable switching contact has an insulating support part disposed on the base so as to at least partially surround the vacuum switching tube of the circuit breaker, the movable switching contact being coupled to the spring motor via the connecting rod. In the insulating support frame for the extreme vacuum circuit breaker, the insulating support part (14) supports various parts (
at least one bearing part (74, 74) bearing part (82);
'), characterized in that the base forms an integral insulating support frame (10). 14) An insulating support frame for a circuit breaker according to any one of claims 2 to 12, in which the insulating support (14) comprises at least one bearing for supporting parts (82) of the spring motor (36). (74, 74') and characterized in that the base forms an integral insulating support frame (10).